But, some things like doomscrolling and procrastination are both huge energy sinks as well as timesinks. However, targeting them is very hard (again, for me), as it is usually not the root problem but a symptom of anxiety and uncertainty, which I often cannot deal with. If the root of the problem is boredom, it should be much easier to unplug and occupy the brain with something more wholesome.
Another thing is obsessive optimization, "am I studying/practicing the best way possible?". "Is it worth it with so little progress?". I keep falling to such traps. Writing this, I found that I feel that I lack an example of people doing stuff in a suboptimal, slacky, yolo way, deriving fun and still achieving some results in the end.